Magnetic integrated induction transformer
By integrating the primary and secondary coils on the core, and using the magnetic core structure to form a series-parallel inductor, it integrates with the main transformer, the large volume and power density caused by the separation of the main transformer and the inductor in the existing power module are solved. Low problems achieve higher power density and compact structure.
Patent Information
- Application Number
- CN202421102322.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-20
AI Technical Summary
In the existing power supply module, the main transformer and the series-parallel inductor are made separately, resulting in a large structure volume and large space. In order to dissipate heat, the volume of the power supply module needs to be increased, which is not conducive to improving power density.
By integrating the primary and secondary coils on the magnetic core and using the magnetic core structure to form a series-parallel inductor, it integrates with the main transformer to reduce the volume of the magnetic device and improve the power density of the transformer inductor.
It realizes higher power density in a limited space, improves the power density of the transformer, reduces losses, and makes the overall structure compact.
Smart Images
Figure CN222530188U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power electronics, in particular to a magnetic integrated inductor transformer. Background Art
[0002] With the development of power electronics technology, the power density of power modules has increased and the size has decreased, which has put higher requirements on the power density, size and heat dissipation of power magnetic components.
[0003] For example, in the existing LLC, LCL and LCC soft-switching resonant converter circuit topologies, the main transformer and the series and parallel inductors are made separately, resulting in a large structure and a large space occupation. In order to better dissipate heat, the volume of the power module has to be increased accordingly, which is not conducive to improving the power density of the power module. Utility Model Content
[0004] In view of this, an embodiment of the utility model provides a high-frequency magnetic integrated transformer with a compact structure, which is beneficial to improving the power density of the power module.
[0005] In order to achieve the above utility model purpose, the following technical solutions are adopted:
[0006] The magnetic integrated inductor transformer provided by the embodiment of the utility model comprises:
[0007] A first magnetic core has a first cavity, a first primary wire winding frame is arranged in the first cavity, and a first primary coil is wound on the first primary wire winding frame;
[0008] The secondary wire winding frame is connected to the first primary wire winding frame and is located in the first cavity. A secondary coil is wound on the secondary wire winding frame.
[0009] Optionally, it further comprises: a second magnetic core having a second cavity, a second primary wire winding frame is arranged in the second cavity, and a second primary coil is wound on the second primary wire winding frame;
[0010] The secondary side wire winding frame is located between the first primary side wire winding frame and the second primary side wire winding frame;
[0011] The first magnetic core is connected to the second magnetic core, and the first primary wire winding frame, the second primary wire winding frame and the secondary wire winding frame are accommodated in a cavity formed by connecting the first magnetic core and the second magnetic core, and insulating partitions are respectively provided between the first primary wire winding frame and the secondary wire winding frame, and between the second primary wire winding frame and the secondary wire winding frame.
[0012] Optionally, an air gap is opened on the first magnetic core and the second magnetic core, and positions of the air gaps of the first magnetic core and the second magnetic core correspond.
[0013] Optionally, air gaps are provided on the middle columns or side columns of the first magnetic core and the second magnetic core.
[0014] Optionally, one air gap is provided or a plurality of air gaps are provided at intervals.
[0015] Optionally, the first primary coil, the second primary coil and the secondary coil have leakage inductance, and the leakage inductance forms a series inductance of the resonant cavity; wherein the resonant cavity is mainly an oscillation circuit formed by an inductor and a capacitor.
[0016] Optionally, the insulating partition is an epoxy board.
[0017] Optionally, the cavity formed by the first magnetic core and the second magnetic core has an opening, and the opening of the first magnetic core and the opening of the second magnetic core are buckled together to form an integrated cavity structure.
[0018] The magnetically integrated inductor transformer provided by the embodiment of the utility model integrates the primary and secondary coils on the magnetic core, and facilitates the leakage inductance and structure of the primary and secondary coils to form a series or parallel inductance, which is equivalent to integrating the series and / or parallel inductance with the primary and secondary coils into one. The volume of the magnetic device (magnetic core) can be reduced, making the overall structure compact, which is conducive to achieving higher power density in a limited space, thereby improving the power density of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 This is a schematic structural diagram of an embodiment of a magnetic integrated inductor transformer of the utility model;
[0021] Figure 2 for Figure 1 Structural explosion diagram of an embodiment of a Zhongci integrated inductor transformer. DETAILED DESCRIPTION
[0022] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.
[0023] It should be clear that in order to more clearly illustrate the utility model, many technical details are described in the following specific embodiments. Those skilled in the art should understand that the utility model can also be implemented without some of the details. In addition, in order to highlight the utility model's purpose, some methods, means, parts and their applications well known to those skilled in the art are not described in detail, but this does not affect the implementation of the utility model. The embodiments described herein are only some of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] To help understand the technical solution of the utility model, the prior art is briefly introduced as follows: With the development of technology, the power density of power modules has increased and the volume has decreased, and higher requirements have been placed on the power density, volume and heat dissipation of power magnetic devices. In the existing soft-switching resonant converter topologies such as phase-shifted LLC and LLC, the main transformer and series-parallel inductors are manufactured separately, resulting in a large volume and a large space. In order to better dissipate heat, the power module needs to be large in volume, which is not conducive to improving the power density of the module, reducing losses and reducing costs.
[0025] The embodiment of the utility model relates to the field of high-frequency transformers, which can be used in soft-switching resonant converter topologies such as phase-shifted LLC and LLC. More broadly speaking, it is also suitable for power switches; the term "high frequency" has a well-known and precise meaning in the field of power electronics technology, which will not be repeated here. The overall concept of this application is to propose integrating the resonant inductor with the main transformer, and utilizing the characteristics and structure of the primary coil and the secondary coil of the main transformer, so that the resonant inductor and the main transformer share a magnetic core, thereby improving the power density of the transformer and reducing losses.
[0026] Figure 1 This is a schematic diagram of the structure of an embodiment of the high-frequency magnetic integrated transformer of the utility model; see Figure 1 The utility model high frequency magnetic integrated transformer comprises: a first magnetic core 1, which can be made of a material with high magnetic permeability and low magnetic loss, and has a first cavity, the interior of which is smooth and flat, ensuring that the winding is closely attached and reducing magnetic flux leakage loss.
[0027] The first cavity is provided with a first primary wire winding frame 2, which can be made of high-temperature insulating material with excellent high-temperature resistance. A highly conductive aluminum wire, copper wire or copper-plated aluminum wire is wound on the first primary wire winding frame 2 to form a first primary coil 3, and the winding process requires uniformity and reliable insulation performance.
[0028] The secondary wire winding frame 7 is connected to the first primary wire winding frame 2 and is located in the first cavity. The secondary wire winding frame 7 uses the same high-temperature insulation material as the first primary wire winding frame 2 to ensure insulation performance and high-temperature resistance. A secondary coil 8 is wound on the secondary wire winding frame 7, using the same high-conductivity wire as the first primary coil 3.
[0029] In some prior arts, the main transformer and the series-parallel inductors are processed separately, which results in the magnetic device being too large in size, too heavy in weight, and having low power density.
[0030] The magnetically integrated inductor transformer provided by the embodiment of the utility model integrates the primary and secondary coils 8 on the magnetic core, and facilitates the leakage inductance and structure of the primary and secondary coils to form a series or parallel inductance, which is equivalent to integrating the series and / or parallel inductance with the primary and secondary coils into one, which can reduce the volume of the magnetic device (magnetic core) and make the overall structure compact, which is conducive to achieving higher power density in a limited space, thereby improving the power density of the transformer.
[0031] In some embodiments, the transformer further includes: a second magnetic core 4, the second magnetic core 4 and the first magnetic core 1 are made of the same material and structure, and have the same magnetic conductivity and low loss characteristics. The second magnetic core 4 has a second cavity, and the internal structure is similar to the first cavity, ensuring that the magnetic flux path is clear and the magnetic loss is minimized. A second primary wire winding skeleton 5 is provided in the second cavity, and a second primary coil 6 is wound on the second primary wire winding skeleton 5, and the winding process is the same as that of the first primary wire winding skeleton 2.
[0032] The secondary side wire winding frame 7 is located between the first primary side wire winding frame 2 and the second primary side wire winding frame 5;
[0033] The first magnetic core 1 is connected to the second magnetic core 4, the first primary wire winding frame 2, the second primary wire winding frame 5 and the secondary wire winding frame are accommodated in a cavity formed by connecting the first magnetic core 1 and the second magnetic core 4, and an insulating partition 9 is provided between the first primary wire winding frame 2 and the secondary wire winding frame 7, and between the second primary wire winding frame 5 and the secondary wire winding frame 7. Optionally, the insulating partition 9 is an epoxy board.
[0034] In this embodiment, insulating partitions 9 are respectively provided between the first primary wire winding frame 2 and the secondary wire winding frame 7, and between the second primary wire winding frame 5 and the secondary wire winding frame 7, so that the various parts are reliably isolated, thereby effectively preventing faults caused by electrical contact and improving the safety and reliability of the electrical equipment.
[0035] In some embodiments, an air gap is provided on the first magnetic core 1 and the second magnetic core 4, and the positions of the air gaps of the first magnetic core 1 and the second magnetic core 4 correspond to each other. By providing an air gap on the transformer magnetic core, the inductance of the primary side or the secondary side can be used as a parallel inductance, so that there is no need to specially set a parallel inductance, thereby reducing the overall volume of the transformer.
[0036] Specifically, air gaps are provided on the middle columns or side columns of the first magnetic core 1 and the second magnetic core 4. The size and position of the air gaps should be precisely controlled according to specific design requirements to ensure that the required magnetic flux density and magnetic permeability can be obtained under working conditions.
[0037] When the first magnetic core 1 and the second magnetic core 4 are buckled together, it is necessary to ensure that the air gap positions correspond to each other, so as to form a closed magnetic circuit in the working state and ensure that the flow and distribution of the magnetic flux can be effectively controlled.
[0038] Specifically, the cavity formed by the first magnetic core 1 and the second magnetic core 4 has an opening, and the opening of the first magnetic core 1 and the opening of the second magnetic core 4 are buckled relative to each other to form an integrated cavity structure.
[0039] The opening of the first magnetic core 1 and the opening of the second magnetic core 4 can be fastened together by welding, bonding or mechanical fastening.
[0040] In some embodiments, the air gap is provided with one or multiple air gaps are provided at intervals. The number and intervals of the air gaps can be adjusted according to parameters such as power and frequency of the transformer to achieve the required magnetic circuit control and performance optimization.
[0041] Continue to view Figure 1 In some embodiments, the first primary coil 3, the second primary coil 6 and the secondary coil 8 have leakage inductance, and the leakage inductance forms a series inductance of the resonant cavity; wherein the resonant cavity is mainly an oscillation circuit formed by an inductor and a capacitor.
[0042] Among them, the first primary coil 3, the second primary coil 6 and the secondary coil 8 can adjust the wall thickness of the winding frame or use epoxy boards of different thicknesses to control the distance between the first primary coil 3, the second primary coil 6 and the secondary coil 8, thereby achieving the purpose of adjusting the leakage inductance.
[0043] In this embodiment, by using the first primary coil 3, the second primary coil 6 or the leakage inductance of the secondary side as the series inductance of the resonant cavity, the problem of increasing the overall volume of the transformer due to the special arrangement of the series inductance is avoided, and the transformer structure can be made more compact.
[0044] In summary, the magnetically integrated inductor transformer provided in the embodiment of the utility model utilizes a magnetic integration method and a magnetic core structure to form a series-parallel inductor, which is integrated with the main transformer, thereby reducing the volume of magnetic devices, improving the power density of the transformer inductor, and reducing losses.
[0045] It should be noted that, in this article, the terms "upper", "lower" and the like indicating the orientation or positional relationship are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. Relational terms such as first and second are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.
[0046] Moreover, the terms "comprises", "comprising" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. For those of ordinary skill in the art, it can be understood by specific circumstances.
[0047] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A magnetic integrated inductor transformer, characterized in that: include: A first magnetic core has a first cavity, a first primary wire winding frame is arranged in the first cavity, and a first primary coil is wound on the first primary wire winding frame; The secondary wire winding frame is connected to the first primary wire winding frame and is located in the first cavity. A secondary coil is wound on the secondary wire winding frame.
2. The transformer according to claim 1, characterized in that: Also includes: A second magnetic core has a second cavity, a second primary wire winding frame is arranged in the second cavity, and a second primary coil is wound on the second primary wire winding frame; The secondary side wire winding frame is located between the first primary side wire winding frame and the second primary side wire winding frame; The first magnetic core is connected to the second magnetic core, and the first primary wire winding frame, the second primary wire winding frame and the secondary wire winding frame are accommodated in a cavity formed by connecting the first magnetic core and the second magnetic core, and insulating partitions are respectively provided between the first primary wire winding frame and the secondary wire winding frame, and between the second primary wire winding frame and the secondary wire winding frame.
3. The transformer according to claim 1, characterized in that: An air gap is formed on the first magnetic core and the second magnetic core, and the positions of the air gaps of the first magnetic core and the second magnetic core correspond to each other.
4. The transformer according to claim 2, characterized in that: An air gap is provided on the middle column or the side column of the first magnetic core and the second magnetic core.
5. The transformer according to claim 3 or 4, characterized in that: The air gap is provided as one or multiple air gaps are provided at intervals.
6. The transformer according to claim 1, characterized in that: The first primary coil, the second primary coil and the secondary coil have leakage inductances, and the leakage inductances form the series inductance of the resonant cavity; wherein the resonant cavity is mainly an oscillating circuit formed by an inductor and a capacitor.
7. The transformer according to claim 2, characterized in that: The insulating partition is an epoxy board.
8. The transformer according to claim 1, characterized in that: The cavity formed by the first magnetic core and the second magnetic core has an opening, and the opening of the first magnetic core and the opening of the second magnetic core are buckled relative to each other to form an integrated cavity structure.